作者： A.J. Roberts , M.J. McGuinness
DOI:
关键词: Convection 、 Foundry 、 Tension (physics) 、 Mechanical engineering 、 Energy cost 、 Casting 、 Flow (psychology) 、 Thermal 、 Engineering 、 Forensic engineering 、 Electrical conductor
摘要: Toowoomba Foundry is seeking help with the design of tall tapered feeders, which supply extra molten iron to poured castings as they cool. There a problem reliability particularly for thicker newer spheroidal graphite irons. An effective feeder remains until casting has set. The setting melt in delayed by making it large enough retain its heat longer than casting, and placing close thermal centre casting. So larger more reliable. But any metal remaining recycled, an associated energy cost. If too small, will set soon, have unwanted holes that may require entire be recycled. Thus there tension between smaller so minimise recycled metal, having good. Existing methods use purely conductive models transport. We investigate relevance convection cooling feeder, up boundary-layer model flow driven density differences. find significant factor effectively maintaining constant temperature across it. height important mainly providing driving force this flow.